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Re: Problems with Windows XP "redirector" and Mac OS X WebDAVFS.

From: Stefan Eissing <stefan.eissing@greenbytes.de>
Date: Wed, 24 Apr 2002 16:08:47 +0200
Cc: "'ietf-dav-versioning@w3.org'" <ietf-dav-versioning@w3.org>
To: "Clemm, Geoff" <gclemm@rational.com>
Message-Id: <CBA4FA93-578C-11D6-9959-00039384827E@greenbytes.de>

Am Mittwoch den, 24. April 2002, um 14:49, schrieb Clemm, Geoff:

> One workaround that comes to mind is to interpret a MOVE from a
> non-version-controlled resource to a checked-out VCR as a COPY/DELETE.

First the good news: if you have a shell on OSX and do a
cp test.txt to /Volumes/dav/test.txt
where "dav" is a WebDAV mounted volumes, the webdav code
in OSX does basically a LOCK/PUT/UNLOCK on an existing
test.txt. So (auto)versioning will do the job.

However if you use the Finder or any Carbon/Cocoa Application,
some library code will do (on save in the GUI):
1) MOVE /Volumes/dav/test.txt /Volumes/dav/test~.txt
2) PUT  /Volumes/dav/data1234.txt
3) MOVE /Volumes/dav/data1234.txt /Volumes/dav/test.txt
4) DELETE /Volumes/dav/test~.txt

(modulo LOCK/UNLOCK)

I see no chance to keep any versioning on text.txt.


> Unless someone comes up with a better idea, I'll add this to the 3253
> "errata" sheet as an interoperability suggestion for the MOVE request.
> Cheers,
> Geoff
>    From: Kasia Jonca [mailto:Kasia.Jonca@merant.com]
>    We've been testing Merant versioning WebDAV server with Windows XP
>    "redirector" and Mac OS X WebDAVFS. The behavior of our versioning
>    WebDAV server is equivalent to the behavior of the DeltaV server
>    with auto versioning.  On the surface things seems to be working
>    but if you look closer the situation is really bad. Both clients
>    behave like a file system and perform what is called a "safe
>    save". This means that the new changes are saved in a temporary
>    file on the WebDAV server, the old file is deleted and then the
>    temp file is renamed. This means that when a file is being saved we
>    lose the previous versions, a new version history is created. Both
>    clients also create a few versions that seem to contain some
>    temporary values making the version history unacceptably polluted.
>    We are quite concerned since both Windows XP "redirector" and Mac
>    OS WebDAVFS would enable access to WebDAV server from any
>    application on those platforms. With this behavior the only
>    solution for us or a DeltaV server would be to deny the write
>    access to these agents so that the user data is not destroyed and
>    polluted. This is quite a change from our expectations on what
>    DeltaV would do for us and we are hoping that some solutions can be
>    still found.  Did anybody test these clients with a DeltaV server
>    implementation? Any comments, suggestions, explanations?
Received on Wednesday, 24 April 2002 10:08:59 UTC

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